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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2065248975f2b84742a7c33adf0a487f5946e473f4954ada7937f00fcaff48f3' 
  AND token = 'KSTnlj/M8Fl97W+a8TUAUa31B59VsliiCtlglgEfhn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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