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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad6ddbd700bb94562bb542a6d8d181c7390236581e6b71f2025c22d999737898' 
  AND token = '8CWW5EYxIcXjfW/BsT/kYUIkiJ/oXasR2qrdvQpf9TU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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