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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c13b1b959c75187ad74e73a88a55788de6b0106c516a05d0d93a4c3b0b1b8c7' 
  AND token = 'j9lolepXOnsaUcs/PpimBCizw3uU0E1eVoMSrdNeTEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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