Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab7bc74474e018fa0b4eb61483fb5d3b9db306aac1ac1c9c8a1b69db28a93866' 
  AND token = 'V1SGrkf5gfQzr49XiWtOZybHuRoR04ki0h14czmrw68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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