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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92e62585de80ad33ea22e2c3b9d565a718e06349f7a3e65137ebaf66a6f9660a' 
  AND token = 'qpGCZmMAIJcPJPKre9qc3IopW4gAew6+THEaHsg06lU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}