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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c48b310cdc7c2396d8c8b5fb63433fb9d811ed602a05ac00b3a32b4b89abbe54' 
  AND token = '03dzead5F0FojQdOSrn/Jbyerf8P8M2QuXh3qhGumro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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