SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '637fbfb009be14ff7c2aba78993411b5c5353c9b71cc87a4e7d7693575a29e3e' 
  AND token = 'LXDqUpF8U3ffWCMV/sbQKfVqbUUjnVwgBPXLqYtqvJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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