Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0a54e3f47c166dd21a0d6dc228c27c8254ea50cbc6a2a68550c3469d4df276a' 
  AND token = '78/q6MhSnrU9a7X3hu5dmTcnUn/MMqDbymJI5wxNXn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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