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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99d1e9338a51b9af5929cab8940395ff830ab608221e2f09c0fe35bd2b8bfacc' 
  AND token = 'w8u+/4Y1qcf1NpRzbtFOPRtizMvh0n33fzV6WVLPj0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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