SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ee14eccab39f6f7afbfcf94b87a0d65dcd8d28fc304cac9a2f099d1438f2371' 
  AND token = 'f8JZMxRFjFZjRYjSIgPbsPUoOpKII14BwP/UMHLYneg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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