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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0334250886e36683eadaac96d5af00ff9a35c930d0d842fca97cda9870745608' 
  AND token = 'duXBsdZnXOqEQ3L99pSBF7Wvu16Ef6Q6l/nhsJodywo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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