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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1980e9853e99a92b4f4a32921ad0a1a308dce171aa4142ae20ef625c9982953' 
  AND token = 'evJr/SBf0SMzOnaOOR8oe7g5nMOqOgndCBle+Fov3/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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