Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b7d8bffeb7bb943694dc5a188b60e7d6642167ae6cfdf3a4f6ba0a962870002' 
  AND token = 'I7MWbaY7kp5cQghOisBeTJ59AZ2tRz571qZJ04mM0Q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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