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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fdba4ff214e7e9ca88526e35fd8d56c976d125b793ae54497b8b4df0b57a30ea' 
  AND token = 'qh4L4N1W5MvpKxx8y8xPCMQ9oW5Clapkqvzn3hXqmSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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