SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aad45c2b3952c9ba69c57cf2ca45a806d3f07c0e80350d89b14170c6a776ef3b' 
  AND token = 'GOV5PWZFfuJXdEHovE+gNSqC5mvYvVX8FeSYeOybNJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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