Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7198daef2c71d75b20cf351753d250259a5ede652d7e86087003acd2badbc0f8' 
  AND token = 'zOjqUu6eem4sTseum+N2WTVdpSS4+Lxm73EWhf5R3HM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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