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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a4b2e1977066a1dde581110051a5205b2689288ce60c3e590a0d526d202380ea' 
  AND token = 'XFMwQ84cXn2u7TyAfVDuqKAL/RJnKOyF2Hfd2m1sZqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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