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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b65b231a79f1e03e6dee88d2cca1f6c0a6d61105856b2941a4ecb4234a3c8ca1' 
  AND token = 'BII0YQ/56Q+r8svXcwKvOP5Pp3mhW74BmY/Eyoi2QQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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