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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee5d661ced6e3883ef4665badfdcd4d473a150a3211416d453d2bbfa2276a2c2' 
  AND token = 'tXqsFzBxA0sm6RinQK9r2KMI3P7pNMIYoPxZcHctBpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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