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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1b505d4b4c0c2f0fd3cfdcd042a9eea95ce567bbdc26a2c705e186054015654' 
  AND token = 'SIgx6pDE+2I/e3YMsWbrjWu5MRyli1ii30FScETDPcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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