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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f1e075611891bfcf48fc12c2cae21026db34964c6ac6cc4a9a2546b97608a64' 
  AND token = 'lg4Pmvr0xyy0FqeNbjLUQgu15yooRSlre3U+mR7co0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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