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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '069c3b50c876ecd3fbff5cf6db58e89afcd24b107530944c8664b33ad521f450' 
  AND token = 'oGIM7jhA7bMqbo54/5zXObnKEQ5UUxjP/WsKvaaXo04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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