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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cae97b0d822e89a7849db45e4fa015b6f6c7bef8f1d0af6906c029db1975f96f' 
  AND token = 'bs6u5ptERL0b7Ir3NJzKCiPDoT2E8kmdmPEXBxbtLa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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