Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7f052c1f6918739708da3b72cfdb901f0b59c4033551a9867a9c98f8328563c' 
  AND token = 'h+C2vf3B1iEmEnak31veznIcufQJs3VnyYe8QAzcL6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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