Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b2e05708734ed2cd6a3d3d0864ae339ce28cc9f7b05a9d9f73e000234750e58' 
  AND token = 'zwUfDnEfAutxkXgTc6UtspoJ21sbJwq9LbJGCNtVQO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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