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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6bdb04d67ad6867c49c4b09a723cecbeb394af0ae44336b1095fba07bf2a49ee' 
  AND token = 'GcOHZPDwX4uRhzxbVLJvbbHc/6Jlx+6lAStkP7Y+Pmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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