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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '71a54135f26ae7d9b73c201aa2aa3223c6aa8db79768c7eb4527c2e49f04c40f' 
  AND token = 'iuonh00BeyOGk4QD+inA9HRWlC7R1joRQpra8cw+iUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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