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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3faea7539756e1124703a8bb76c8e2ebf4a86c0769ffc4de2825b505e1e5611' 
  AND token = 'VjORgxqYE49oEpQ1f2DC/0qR+psbYiQ8A4g/EK5ycsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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