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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b697945f872e1abba8a349ced479b3ece111a9e68b3466826ed6e0a4c5b57e2a' 
  AND token = 'NgvfMBd7eD9PNNAN17aLDrOA6Zp5xzRUehfX4pc+0e4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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