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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a8d12f09670ddc21011fbb781404c723f94429ffa650c040c719ec72e973839' 
  AND token = 'SGk4mK3QnKkxKsy+nIba3Mr9NeZx0Sh3Wi5DCsMHXW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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