Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '976115ef2d014430e6fbfa90a7da75f14044dca15bc597ed6bb051bf6d2177c1' 
  AND token = 'zMRPa74XU/WIwcCwNPSfpkOmrisLRXKoF++yJJnBsSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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