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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'defde9ada5677e7dbc584e5ae14e8119b86a8497b2d5bb82ed496d8bcc448fb6' 
  AND token = 'BnwT5isy5toEjNn3oxLNDAgUphg6cAHFEmj+rN8v5oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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