Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f86ab013630236a234d03d2f25446166a3bdcc5bd1a74fd8668231d08f855e87' 
  AND token = '8Xh26Hot2FIKbnU86z8I7xcXSw18ucBnOiiuLZvCGTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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