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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '768d0a2a2a8d34b8a89eeb3b49aac7414bef187d4bfd86c0c94c59a603285eeb' 
  AND token = 'RmhehIAYt5Tv9grwyKFbI4U6qpElgk8Fq09XnlZGP0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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