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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7e25efb7fdf799d5ed412f08b950cbe66e56818279448eefbeb9ac7fc91d9f4' 
  AND token = 'y/D0B7LKs5euICxaJNifrxbbnXxvmr9EufNeu+wAWTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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