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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0096e200647ab465f3966c17813cb33f1df9ee194aa9b9acc15ea5a384288288' 
  AND token = 'WlkzXV9tC3aLIjHnrwJ5E7AFf27kTo+I5mugtH8l+kU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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