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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '082bb469b1aa28e2b362106685bf5e28e2dce1d8d26c7a2196abc055b51c93bd' 
  AND token = 'Vou+lll9MxKIehBhbBFq7WEIOrOOH2jHelVU6I5OlJw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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