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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f28cf2aee2b90674977aa058a7789a72224fa4ce39613233fe93f34f108d6580' 
  AND token = 'Vz78iQb2qX5KBP+13PlQqlJ83ICYt3tPWskewqZXftk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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