Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5cc24136c189dfc0cc5e0ef498f5ce784e5bc77927005a23bc45c09a243c0da2' 
  AND token = 'NE1v898Wigf4pso1BZUjmI91VOR7zsorhObTBiQu8fM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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