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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2722165dfb6d81f6b4ed60a14b2add3d202a9041ea6c85bdc866f56471d4845b' 
  AND token = 'WxMzWnTIK8Mm9UEieaZaRj89LA/tvX7XuCZ24vc7NOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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