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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04f180f87d29958a6360e87e9a98150b3ba37b272ac71773df68bf11a4c9e528' 
  AND token = 'ODsyXavwmAWz/ZYdYxOfqWU7mzQIVIh1HtE42roAcZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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