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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ce75dbe0eb0274607de73729aa3eccef3247aadc33dfd16f510b82742feb90f5' 
  AND token = 'E6aR8nA9Bi/gQyjbRD+vF91fZuOfhygSoYByFpozp84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}